diff --git a/Backend/auth.ts b/Backend/auth.ts
index fa34bed..be518f4 100644
--- a/Backend/auth.ts
+++ b/Backend/auth.ts
@@ -16,6 +16,9 @@ export const auth = betterAuth({
     schema: {
       ...schema,
       user: schema.users,
+      account: schema.accounts,
+      session: schema.sessions,
+      verification: schema.verifications,
     },
   }),
   advanced: {
diff --git a/Backend/db/schema.ts b/Backend/db/schema.ts
index b43e6e0..52ebd5d 100644
--- a/Backend/db/schema.ts
+++ b/Backend/db/schema.ts
@@ -4,7 +4,7 @@ export const users = pgTable('users', {
   id: uuid('id').defaultRandom().primaryKey(),
   email: varchar('email', { length: 255 }).notNull().unique(),
   name: varchar('name', { length: 255 }).notNull(),
-  passwordHash: varchar('password_hash', { length: 255 }).notNull(),
+  passwordHash: varchar('password_hash', { length: 255 }),
   emailVerified: boolean('email_verified').default(false).notNull(),
   image: text('image'),
   createdAt: timestamp('created_at', { withTimezone: true }).defaultNow().notNull(),
diff --git a/Backend/drizzle/0013_users_password_hash_nullable.sql b/Backend/drizzle/0013_users_password_hash_nullable.sql
new file mode 100644
index 0000000..43e34cf
--- /dev/null
+++ b/Backend/drizzle/0013_users_password_hash_nullable.sql
@@ -0,0 +1 @@
+ALTER TABLE "users" ALTER COLUMN "password_hash" DROP NOT NULL;
diff --git a/Backend/drizzle/meta/_journal.json b/Backend/drizzle/meta/_journal.json
index a6a1720..5062889 100644
--- a/Backend/drizzle/meta/_journal.json
+++ b/Backend/drizzle/meta/_journal.json
@@ -92,6 +92,13 @@
       "when": 1770740394562,
       "tag": "0012_natural_daredevil",
       "breakpoints": true
+    },
+    {
+      "idx": 13,
+      "version": "7",
+      "when": 1770800000000,
+      "tag": "0013_users_password_hash_nullable",
+      "breakpoints": true
     }
   ]
-}
\ No newline at end of file
+}
diff --git a/Backend/public/mobile-sim.js b/Backend/public/mobile-sim.js
index 3fd0e5b..d9cf7bd 100644
--- a/Backend/public/mobile-sim.js
+++ b/Backend/public/mobile-sim.js
@@ -127,7 +127,13 @@
         const payload = await response.json().catch(() => ({}));
 
         if (!response.ok) {
-          throw new Error(payload.message || response.statusText);
+          const errorMessage =
+            payload?.message ||
+            payload?.error?.message ||
+            payload?.error ||
+            payload?.code ||
+            `${response.status} ${response.statusText}`;
+          throw new Error(errorMessage);
         }
 
         return payload;